$A$ secondary cell is one that:

Efficiency of a cell with cell reaction under standard conditions is $70\%$. Cell reaction:
$A_{(s)} + B^{\oplus} \longrightarrow A^{\oplus} + B_{(s)}$ ; $\Delta H^o = -551.5 \ kJ$. Calculate standard electrode potential of cell (in $volt$).

In a hydrogen-oxygen fuel cell,the combustion of hydrogen occurs to:

The metals that are employed in the battery industries are
$A$. $Fe$ $B$. $Mn$ $C$. $Ni$ $D$. $Cr$ $E$. $Cd$
Choose the correct answer from the options given below:

Identify the anode,cathode,positive electrode,and negative electrode for the $Daniell$ cell $(Zn-Cu)$ and the $Copper-Silver$ $(Cu-Ag)$ cell.

Write the reactions for the following:
$1.$ Oxidation and reduction reactions of a lead storage cell.
$2.$ Cell reaction of a $Ni-Cd$ cell.
$3.$ Anode,cathode,and overall reaction of a mercury cell.